Artificial arm.



A. VISEL.

ARTIFICIAL ARM.

APPLIGATION FILED PEB.26, 1914.

Patented Sept.22,1914.

1H5 NORRIS I-"ETERs L PHOTO-LITHLI, WASHINGTON. D. C

TED-{Srarns PAT NT on IoE;

tom massesal mnae; WISCONSIN, Assr enon or onn-nanr ro 'sAMunL w.

; w I ,;;LnE1vi11\Te, or M WAUKEE, WISCUNSIN.

To allfwhovjtit aa zmams QBe'it knownthatLADoLr VIsEL, a-ci'tizen of the United States, and resident of Milivaukee, linlthe "county of Milwaukee and State of isconsim'have invented certain new and useful Improvements in Artificial Arms; and Fido hereby declare'that the fol lowing is a thereof.

accompanying drawings and pointed out in the claims of this sp'ecification,- its object being toprovide artificiararms each preferably provided with a springcontrolled gripping-thumb 'c ommon 'in the art, and

' with a spring-controlled pivotally adjusts able wrist-hook by which to grip tool handles and other devices, the wrist-hook being retractive in 'albhamber provided for its con Figure 1 of the drawings represents a perspective view of one of my improved artificial. arms having the hand and a wrist hook member thereof grasping the handle of a hammer-Fi 2 a sectional view indicated sectional view byline 2--2 in Figs. 1 and 3, and Fig. 3, a indicated by rliney3 3 in Fig. 2. I J

indicates a band with which to engage an arm-stump of a person utilizing an artificial i withbrackets 8 attachedto saidasleeve, all

of which is usual in the art, as is-Falso a forearm 5 fitted at its outer end in a socket 6 having A lever extensions .7 in articulation cushion wrist-block 9 facing said-socket,

Fastened to theywrist-end of the; handpiece 0 of'the armfis a housingll, and ex tending rearward fromthe housing through the block" 9' is afshank 12 having screwthread engagement with an inner nipple 13 of the socket 6. Asa matter'of idetaihj'the housing 11 and a flange 1 1 of thesame are fastenedlm t e hand-piece'10by screwsn,

15, and the outer end ofthe shank-l2 is, upset connection with said housing or otherwise suitably fastened thereto, itjbeing full, clear, and exact description My invention consists in. what "is herein particularlyset forth with reference to the nii rrrrcrar. tam.

j Speeificationof ZettersPatent. Patented Sept, 1 i "Application filed February 26, 1914.

. Serial mfsalniaj common in-the art to provide the hand-piece of'an artificial arm with a similar shank;

l Vithin the housing 1110089011 a stud 16 of the same is the ratchet end 17 of a book 18 that is detachably secured inplace by the headbfascrew 19. engaging said stud and the inner face of the hook is preferably srrated. Engaging the stud 16 and the hook lSare the ends of a spiral-spring 20 ofsuitable strength under tension. The housing is provided with guide-lugs 21- and 22 for a 23 that engages with the ratchet-end 17 the hook 18, and a spiral spring :24 is employed on the shankof the dog between a shoulder of said dog and the lug 21in which sa d shank 1s guided, sa ddogbeing'lre tracted agalnst resistance of the: spring;

Outside of the housing 11, the shankend of thumb 26 is the usualcord 29 designed for connection with a body-harness of the. cripple equipped with the artificial arm.

In practice, a stretching forward of the artificial arm causes a' draw of the cord 29 upon the thumb 26 to pull said thumb more or less out of normal position, and an object interposed between said thumb and adjacent forefinger of the hand is grasped when said cord is slackened, owing to the contractive power of the spring 28, this being customary practice. For secure holding of some obj ects, particularly tool handles, the grasp between the thumband adjacent portion of the remainderfofflthe hand is too infirm, in which case, the hook 18 is utilized in conjunction with said thumb as an adjustable gripping-member of the-hand. To utilize in it's adjusted position. It is also to be noted that the hook-gripped object is caught against the arm socket 6 upon which comes the greatest strain inthe use of said object especially if the same hethe handle of a tool, and the hook being serrated, as aforesaid, it takes the best possible hold."

"1. 'An artificial-arm having a housing at the wrist thereof, a spring-controlled hook vhaving a ratchet-end thereof pivoted in the 1 housing into which said hook asQa Whole is retractive, and a spr ng-controlledratchetengaging dog guided in said housing through which lts shank extends. v

2. An art1fic1al-ar1n havlng a housing at the wrist thereof and a gripping meansforward of the housing, avspring-controlled hook having a ratchet-end thereof pivoted in the housing into which said hook as a whole is retractive, and a spring-controlled ratchet-engaging dog guided in said housing through-which its shank extends.

,3. Anartificialarln having a housing at the wrist thereof, a pivot-stud within the :Gopies of this patent may be obtained for housing,a spring-controlled hook having a ratchet-end looseon "the stud, means by which the hook is detachably secured on said stud, said: hook being 'i'etractivefsaid housing; and 'a springwontrolled ratchetengaging dog guided in thehousing through which its shank extends.

4:. An artificial-arm'havinga housing at the wrist thereof, a pivot-stud within the housing, a hook having .a ratchet-endin de-o tachable engagement with the stud to turn thereon, a spiral-spring .und'er tension, se

cured'at its ends tosaidstud andliook, the a. I

hook being retractive in said "housing, and

fivejcents each, by addressing the 'flom'missioner of Patents.

Washington, 110.? t w i a spring -j controlled ratchet engaging dog- 

